Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Macchi, Andrea"'
The partial reflection of an electromagnetic (EM) wave from a medium leads to absorption of momentum in the direction perpendicular to the surface (the standard radiation pressure) {and, for oblique incidence on a partially reflecting medium}, also i
Externí odkaz:
http://arxiv.org/abs/1903.10393
Autor:
Macchi, Andrea
A short, tutorial introduction to some basic concepts of laser-plasma interactions at ultra-high intensities is given. The selected topics include a) elements of the relativistic dynamics of an electron in electromagnetic fields, including the ponder
Externí odkaz:
http://arxiv.org/abs/1806.06014
Autor:
Cantono, Giada, Sgattoni, Andrea, Fedeli, Luca, Garzella, David, Réau, Fabrice, Riconda, Caterina, Macchi, Andrea, Ceccotti, Tiberio
The excitation of surface plasmons with ultra-intense ($I\sim 5\times 10^{19}$ W/cm$^2$), high contrast ($\sim 10^{12}$) laser pulses on periodically-modulated solid targets has been recently demonstrated to produce collimated bunches of energetic el
Externí odkaz:
http://arxiv.org/abs/1802.05483
Autor:
Macchi, Andrea
An overview of research on laser-plasma based acceleration of ions is given. The experimental state of the art is summarized and recent progress is discussed. The basic acceleration processes are briefly reviewed with an outlook on hybrid mechanisms
Externí odkaz:
http://arxiv.org/abs/1712.06443
A concept for the efficient generation of surface plasmon polaritons (SPPs) with a duration of very few cycles is presented. The scheme is based on grating coupling and laser pulses with wavefront rotation (WFR), so that the resonance condition for S
Externí odkaz:
http://arxiv.org/abs/1711.02899
Publikováno v:
Phys. Rev. E 96, 033204 (2017)
The Weibel instability from counterstreaming plasma flows is a basic process highly relevant for collisionless shock formation in astrophysics. In this Letter we investigate, via two- and three- dimensional simulations, suitable configurations for la
Externí odkaz:
http://arxiv.org/abs/1705.05402
Publikováno v:
L. Fedeli, A. Sgattoni, G. Cantono, A. Macchi "Relativistic surface plasmon enhanced harmonic generation from gratings" Applied Physics Letters 110(5) 051103 (2017)
The role of relativistic surface plasmons (SPs) in high order harmonic emission from laser-irradiated grating targets has been investigated by means of particle-in-cell simulations. SP excitation drives a strong enhancement of the intensity of harmon
Externí odkaz:
http://arxiv.org/abs/1611.06706
Autor:
Fedeli, Luca, Sgattoni, Andrea, Cantono, Giada, Garzella, David, Réau, Fabrice, Prencipe, Irene, Passoni, Matteo, Raynaud, Michèle, Květoň, Milan, Proska, Jan, Macchi, Andrea, Ceccotti, Tiberio
Publikováno v:
Phys. Rev. Lett. 116, 015001 (2016)
The generation of energetic electron bunches by the interaction of a short, ultra-intense ($I>10^{19} \textrm{W/cm}^2$) laser pulse with "grating" targets has been investigated in a regime of ultra-high pulse-to-prepulse contrast ($10^{12}$). For inc
Externí odkaz:
http://arxiv.org/abs/1508.02328
We present a Vlasov, i.e. a kinetic Eulerian simulation study of nonlinear collisionless ion-acoustic shocks and solitons excited by an intense laser interacting with an overdense plasma. The use of the Vlasov code avoids problems with low particle s
Externí odkaz:
http://arxiv.org/abs/1507.08585